Lhzux - IBM PPC440X5 CPU Core User Manual

lhzux

Load Halfword and Zero with Update Indexed
PPC440x5 CPU Core User's Manual
lhzux
Load Halfword and Zero with Update Indexed
lhzux RT, RA, RB
31
0 6
EA (RA|0) + (RB)
(RA) EA
16
(RT) 0 || MS(EA,2)
An effective address (EA) is formed by adding an index to a base address. The index is the contents of
register RB. The base address is 0 if the RA field is 0 and is the contents of register RA otherwise. The EA is
placed into register RA.
The halfword at the EA is extended to 32 bits by concatenating 16 0-bits to its left. The result is placed into
register RT.
If instruction bit 31 contains 1, the contents of CR[CR0] are undefined.
Registers Altered
• RA
• RT
Invalid Instruction Forms
• Reserved fields
• RA = RT
• RA = 0
Page 332 of 589
RT RA
11
RB
16 21
Preliminary
311
31
instrset.fm.
September 12, 2002